Fig. 9From: Spectacular rediscovery of the original prints of radiographs Roentgen sent to Lorentz in 1896A compass in a closed metal box. This image shows that, if the metal of the box is not too thick, the X-rays will pass and thus visualize the compass needle. Manually written legend: ‘Magnetnadel in Metalldose’ (compass needle inside a metal box). Paragraph referral: § 14Back to article page